Examine the diagram.  Which number on the scale represents equal numbers of H+ and OH-?  

What type of solution (based on pH) is depicted in the image?  

Identify two of the three tenets of the cell theory.

List the four main tissue types.

What type of transport across the cell membrane is indicated by the diagram?  

A student was investigating factors that influence enzyme reactions.  In the experiment, they used an enzyme called catalase which catalyzes the breakdown of H2O2  (hydrogen peroxide) into H2O (water) and O2 (oxygen gas).  In each of the tubes, they put a different amount of catalase.   Tube 1 – no catalase + 5ml hydrogen peroxide Tube 2 – 1ml catalase + 5ml hydrogen peroxide Tube 3 – 2ml catalase + 5ml hydrogen peroxide Then the student recorded the following results: TUBE Volume of Bubbles Observations 1 0ml No bubbles visible 2 5ml Bubbles are white, frothy and about halfway up the tube 3 9ml Bubbles are white, frothy and almost to the top of the tube   Enzymes such as a catalase, belong to which category of macromolecules that make up cells?

Match the correct function(s) with the appropriate type of organic molecule.

Explain the difference between magnification and resolution.

List the major chemical elements in cells (hint: CHNOPS)

How is total magnification determined?